Offline chart installs broken

[jedcunningham]

Official Helm Chart version

main (development)

Apache Airflow version

2.2.3 (latest released)

Kubernetes Version

1.21.5

Helm Chart configuration

No response

Docker Image customisations

No response

What happened

If you don't have outbound routing to the internet, you cannot install/template/lint the helm chart, e.g:

$ helm upgrade --install oss ~/github/airflow/chart 
Release "oss" does not exist. Installing it now.
Error: values don't meet the specifications of the schema(s) in the following chart(s):
airflow:
Get "https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master/v1.22.0-standalone-strict/networkpolicypeer-networking-v1.json": dial tcp: lookup raw.githubusercontent.com: no such host

What you expected to happen

The chart should function without requiring outbound internet access.

How to reproduce

Disable networking and try installing the chart.

Anything else

We use external schema references in our chart, e.g:

airflow/chart/values.schema.json

Line 1298 in 8acfe8d

"$ref": "https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master/v1.22.0-standalone-strict/resourcerequirements-v1.json"

Unfortunately, naively using relative filesystem reference in values.schema.json doesn't work properly in helm (see helm/helm#10481).

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct